sharon chin is in san francisco with a preview of the proceedings and joins us now. good morning. >> reporter: good morning. kimberly bell is expected to testify today kicking off week 2 of the bonds trial. barry bonds' former mistress is examined to say that he told her before the 2000 baseball season that he was using steroids. in what could be sensational testimony she plans to tell the jury she witnessed changes in the slugger, acne, bloating, hair loss and changes to his genitals. bonds is accused of lying to a grand jury in 2003 when testified he never knowingly used steroids. other witnesses scheduled to take the stand for the prosecution this week in the bonds trial, giants clubhouse manager mike murphy expected to describe the increase in bonds' hat size. the team's former trainer stan conte will talk about his interactions with bonds and physical changes he saw. and mike wilson a special agent with the irs is expected to testify about a box of folders he seized from balco laboratories and how bonds' urine sample was handled. the trial is expected to continu